WLAN Uplink RU Signaling for Adaptive PPDU Transmission
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Solution Overview
Problem
In WLAN communication, the existing uplink resource allocation methods, particularly in the EHT standard, do not adapt efficiently when a station (STA) transmits data on an adaptive resource unit (RU), leading to reduced communication efficiency due to mismatched bit configurations between adaptive and complete RUs.
Innovation Solution
The method involves an access point (AP) sending indication information to a STA, allowing it to transmit a physical layer protocol data unit (PPDU) based on a part of the allocated RU, which includes an LDPC extra symbol segment, ensuring the STA adapts its transmission to the adaptive RU, thereby improving decoding performance and efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of information
If the AP specifies whether the STA performs transmission based on the symbol segment according to the existing implementation, then the overhead is reduced, but the STA cannot adapt to transmission on adaptive RU, reducing communication efficiency
Solution Approach 1:
The patent introduces dynamic adaptation mechanisms where the STA can flexibly adjust its transmission parameters based on the actual RU allocation. The indication information enables the STA to dynamically determine whether to perform transmission based on symbol segments, allowing the system to adapt to different RU configurations (adaptive RU vs. complete RU/MRU) while maintaining efficient communication.
Solution Approach 2:
The patent changes the parameter configuration by introducing indication information that specifies whether transmission should be performed based on symbol segments. This parameter change allows the system to switch between different transmission modes (with or without symbol segment-based transmission) depending on the RU allocation type, thereby resolving the contradiction between overhead reduction and communication efficiency.
2Adaptability or versatility
If the STA transmits on adaptive RU with different bit configurations, then the transmission adapts to available resources, but decoding performance deteriorates due to mismatch with AP specifications
Solution Approach 1:
The patent implements a feedback mechanism where the AP sends indication information to the STA regarding the transmission mode (whether to use symbol segment-based transmission). This feedback ensures that the STA's transmission configuration matches the AP's decoding expectations, thereby maintaining decoding performance while allowing adaptability in transmission resources.
Solution Approach 2:
The patent applies preliminary action by having the AP pre-specify the transmission mode through indication information before the STA performs transmission. This preliminary configuration ensures that the STA knows in advance whether to use symbol segment-based transmission, allowing it to adapt its bit configuration appropriately while ensuring the AP can correctly decode the transmission.
Data Source
AI summary
This application provides example communication methods and devices to improve wireless local area network (WLAN) communication efficiency. In an example method, an access point (AP) sends first indication information. The first indication information indicates a first resource unit (RU) of a station (STA). The AP sends second indication information. The second indication information indicates whether the STA is allowed to send a physical layer protocol data unit (PPDU) based on a part of the first RU, and when the second indication information indicates that the STA is allowed to send the PPDU based on the part of the first RU. The PPDU includes a low density parity check (LDPC) extra symbol segment. The AP receives a first PPDU. A second RU occupied by the first PPDU is the part of the first RU. The first PPDU includes the LDPC extra symbol segment.